Hi everyone! I'm a lifelong PC user who is finally making the transition to Mac. My mom and I just ordered a 15" MacBook Pro as a Bday/Christmas present and I'm really excited! Anyway, my question is, what exactly is the logic board and why/when does it have problems? I have two friends who each have a MBP (both around 2.5 years old) and they've both needed to have the logic board replaced. It sounds like a scary experience, opening your comp and seeing that it just doesn't work, so is there any way to prevent this sort of thing from happening? I haven't been able to find much info on this topic, so sorry if this is a repost. I'm trying to get as much info as possible on how to make my MBP last a while. Thanks a lot!